There is this new game announced yesterday for the 3DS which is called 'Pokémon Tretta Lab'. It's a game with 3D Models and information about the Pokémon and imo, it's just another useless Spin-Off game. But the reason why I post it here is because the game comes wit h three Pucks: Eevee, Mewtwo and Lucario. See it? Eevee evolves into Sylveon, Mewtwo has a new Forme and Lucario? Does Lucario gets a new Forme, an evolution or gets Riolu an alternate evolution?

I'm not saying this is evidence for something new about Lucario, but GF may be hinting something.